package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.ShoppingCart;
import com.itheima.reggie.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.List;

/**
 * 购物车
 */
@Slf4j
@RestController
@RequestMapping("/shoppingCart")
public class ShoppingCartController {

    @Autowired
    private ShoppingCartService shoppingCartService;
    @PostMapping("/add")
    public R<ShoppingCart>add(@RequestBody ShoppingCart shoppingCart){
        log.info("购物车数据:{}",shoppingCart);

//        A. 获取当前登录用户，为购物车对象赋值
        Long currentId = BaseContext.getCurrentId();
        shoppingCart.setUserId(currentId);
        // 服务器传递的dish id
        Long dishId = shoppingCart.getDishId();
        System.out.println("xxxxxxxxxxxxxxxxxxx"+dishId);
//        B. 根据当前登录用户ID 及 本次添加的菜品ID/套餐ID，查询购物车数据是否存在
        LambdaQueryWrapper<ShoppingCart> qw = new LambdaQueryWrapper<>();
        qw.eq(ShoppingCart::getUserId,currentId);

        if(dishId!=null){
            qw.eq(ShoppingCart::getDishId,dishId);
        }else {
            qw.eq(ShoppingCart::getSetmealId,shoppingCart.getSetmealId());
        }
        ShoppingCart one = shoppingCartService.getOne(qw);
//        C. 如果已经存在，就在原来数量基础上加1
        if (one!=null){
            Integer number = one.getNumber();
            one.setNumber(number+1);
            shoppingCartService.updateById(one);
        }
//        D. 如果不存在，则添加到购物车，数量默认就是1
            else {
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartService.save(shoppingCart);
            one = shoppingCart;


        }

        return R.success(one);
    }
    @GetMapping("/list")
    public R<List<ShoppingCart>> list(){
        log.info("查看购物车...");

        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,BaseContext.getCurrentId());
        queryWrapper.orderByAsc(ShoppingCart::getCreateTime);

        List<ShoppingCart> list = shoppingCartService.list(queryWrapper);

        return R.success(list);
    }

    @DeleteMapping("/clean")
    public R<String> clean(){
        Long currentId = BaseContext.getCurrentId();
        LambdaQueryWrapper<ShoppingCart> qw = new LambdaQueryWrapper<>();
        qw.eq(ShoppingCart::getUserId,currentId);
        shoppingCartService.remove(qw);
        return R.success("删除成功");
    }


}